Fix testcase issue

Refactor link rendering to use overriding titles only when appropriate

Author: Kyle-Ye

Sources/SwiftDocC/Model/Rendering/RenderContentCompiler.swift

@@ -169,12 +169,24 @@ struct RenderContentCompiler: MarkupVisitor {
         let plainTextLinkTitle = linkTitleInlineContent.plainText
         let overridingTitle = plainTextLinkTitle.isEmpty ? nil : plainTextLinkTitle
         let overridingTitleInlineContent = linkTitleInlineContent.isEmpty ? nil : linkTitleInlineContent
+        
+        let useOverriding: Bool
+        if link.isAutolink { // If the link is an auto link, we don't use overriding info
+            useOverriding = false
+        } else if let overridingTitle,
+                  overridingTitle.hasPrefix(DocumentationSchemeHandler.scheme + ":"),
+                  destination.hasPrefix(DocumentationSchemeHandler.fullScheme),
+                  destination.hasSuffix(overridingTitle.dropFirst((DocumentationSchemeHandler.scheme + ":").count)) { // If the link is a transformed doc link, we don't use overriding info
+            useOverriding = false
+        } else {
+            useOverriding = true
+        }
         return [
             RenderInlineContent.reference(
                 identifier: .init(resolved.absoluteString),
                 isActive: true,
-                overridingTitle: link.isAutolink ? nil : overridingTitle,
-                overridingTitleInlineContent: link.isAutolink ? nil : overridingTitleInlineContent
+                overridingTitle: useOverriding ? overridingTitle : nil,
+                overridingTitleInlineContent: useOverriding ? overridingTitleInlineContent : nil
             )
         ]
     }

Sources/SwiftDocC/Semantics/MarkupReferenceResolver.swift

@@ -112,10 +112,8 @@ struct MarkupReferenceResolver: MarkupRewriter {
         guard let resolvedURL = resolve(reference: unresolved, range: link.range, severity: .warning) else {
             return link
         }
-        let isAutolink = link.isAutolink // save the original isAutolink status
         var link = link
         link.destination = resolvedURL.absoluteString
-        link.isAutolink = isAutolink // restore the original isAutolink status
         return link
     }